We are not alone...In a cave in the Himalayas, a guide discovers a self-mutilated body with the warning--Satan exists. In the Kalahari Desert, a nun unearths evidence of a proto-human species and a deity called Older-than-Old. In Bosnia, something has been feeding upon the dead in a mass grave. So begins mankind's most shocking realization: that the underworld is a vast geological labyrinth populated by another race of beings. Some call them devils or demons. But they are real. They are down there. And they are waiting for us to find them...

Hell exists. It is a real, geological, historical place beneath our very feet. And it is inhabited savagely. In an intense and imaginative tour de force, New York Times bestselling author Jeff Long takes readers into the depths of the earth where a primordial intelligence waits in the darkness. A decade has passed since doomed explorers unveiled a nightmare of tunnels and rivers honeycombing the earth's depths. After millennia of suffering terror and predation, humanity's armies descended to destroy the ancient hordes. Deep beneath the Pacific Ocean, a doomed science expedition killed the...

A half mile up the sunlit walls of Yosemite, a rope breaks, a young woman plunges to her death, and the rescue from hell begins.

Thirty-five years ago, Hugh Glass found glory on El Cap, and met the woman he would marry and lose. Now he's back to climb the wall again, and make a fresh start. But when disaster strikes a team of women high above, Hugh finds himself drawn into a dead vertical race against time. Plagued by fire, ice, and old demons, he reaches the wreckage of the fall, where the rescuers become the victims. Caught between the golden summit and terminal velocity, they cannot...